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M2.5 earthquake near Guánica, Puerto Rico

A magnitude 2.5 earthquake struck near Guánica, Puerto Rico at 10:13 local time (14:13 UTC) on 18 Sept 2026, at a depth of 9 km, according to USGS.

Data: USGS · updated 2026-09-18 14:46 UTC · reviewed

Magnitude
2.5micro
duration magnitude (md)
Depth
9.2 km
Status
Reviewed
Origin time
2026-09-18 14:13:34 UTC
Local: 18 Sept 2026, 10:13:34 (America/Puerto Rico)
Epicentre
17.956° N, 66.934° W

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
GuánicaPuerto Rico · pop. 9,2243 kmIIIWeak
YaucoPuerto Rico · pop. 20,29512 kmIIWeak
PoncePuerto Rico · pop. 137,49134 kmINot felt
MayagüezPuerto Rico · pop. 73,07735 kmINot felt
AreciboPuerto Rico · pop. 87,75461 kmINot felt
San JuanPuerto Rico · pop. 418,140104 kmINot felt
Santo Domingo EsteSanto Domingo Province, Dominican Republic · pop. 700,000314 kmINot felt
Santo DomingoNacional, Dominican Republic · pop. 2,201,941317 kmINot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more. Likely felt out to about 3 km.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS · PR, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGS · PRheadlinePuerto Rico Seismic Network via U.S. Geological Survey2.5 md9.2 km17.96° N, 66.93° W–Reviewed

How big was it?

Usually not felt. Recorded by nearby seismometers; thousands occur worldwide every day.

It released roughly the energy of 91 kg of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 9 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M2.5 releases about 34× the energy of M1.5, and its waves are about 10× taller on a seismogram. Energy: 91 kg of TNT vs 3 kg of TNT.

Each square is the energy of one M1.5. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

54 later earthquakes within 30 km; the largest was M3.4 10 days ago. 10 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M2.5

54 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
2.732.68
2.742.78
3.123.46
4.172.88
4.182.56
5.192.76
5.253.07
7.462.58
8.042.57
8.242.67
12.982.59
13.002.513
13.342.57
14.593.07
14.893.18
15.303.18
26.302.88
32.552.69
34.012.57
54.323.08
57.422.57
82.292.111
82.822.215
86.862.017
95.531.811
96.512.17
97.541.87
101.122.28
106.842.18
109.002.27
110.702.117
112.032.57
122.801.78
124.052.314
126.622.18
126.702.37
129.052.08
133.301.99
149.042.112
151.142.68
152.042.46
154.082.37
164.052.09
166.792.17
190.282.49
195.452.18
205.342.16
207.871.27
207.872.08
207.881.27
208.202.37
229.151.77
233.402.27
242.902.017
  1. 3.45 km W of Guánica, Puerto Rico09-18 17:20
  2. 3.15 km SW of Guánica, Puerto Rico09-19 05:06
  3. 3.15 km W of Guánica, Puerto Rico09-19 05:31
  4. 3.05 km WSW of Guánica, Puerto Rico09-18 19:28
  5. 3.04 km SW of Guánica, Puerto Rico09-19 04:49
  6. 3.05 km WSW of Guánica, Puerto Rico09-20 20:32
  7. 2.84 km WSW of Guánica, Puerto Rico09-18 18:23
  8. 2.8Near Guánica, Puerto Rico09-19 16:31
  9. 2.75 km W of Guánica, Puerto Rico09-18 19:24
  10. 2.76 km WSW of Guánica, Puerto Rico09-18 16:57
  11. 2.67 km SW of Guánica, Puerto Rico09-24 21:21
  12. 2.65 km SW of Guánica, Puerto Rico09-19 22:46
  13. 2.65 km WSW of Guánica, Puerto Rico09-18 22:28
  14. 2.64 km W of Guánica, Puerto Rico09-18 16:57
  15. 2.5Near Guánica, Puerto Rico09-18 21:41
  16. 2.55 km SSW of Guánica, Puerto Rico09-18 18:24
  17. 2.54 km W of Guánica, Puerto Rico09-20 00:13
  18. 2.55 km SW of Guánica, Puerto Rico09-23 06:15
  19. 2.54 km W of Guánica, Puerto Rico09-20 23:38
  20. 2.54 km SSW of Guánica, Puerto Rico09-19 03:13
  21. 2.54 km SW of Guánica, Puerto Rico09-19 03:33
  22. 2.54 km SW of Guánica, Puerto Rico09-19 03:12
  23. 2.55 km SW of Guánica, Puerto Rico09-18 22:15
  24. 2.45 km WSW of Guánica, Puerto Rico09-24 22:16
  25. 2.44 km SE of Guánica, Puerto Rico09-26 12:30

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Reports on SeismoAtlas

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Event id pr71532288. First recorded here 28 Sept 2026, 17:32:11 UTC. Solutions: USGS · PR (usgs:pr71532288). Cite as: SeismoAtlas, “M2.5 earthquake near Guánica, Puerto Rico”, https://seismoatlas.com/earthquake/pr71532288-m2-5-earthquake-near-guanica-puerto-rico, data from USGS.

JSON: /api/v1/events/pr71532288. SeismoAtlas is not an official warning service.